Mike Ryan II, Allan Voshall and Stephen Gao History flows on a river of time. It is comprised of fact, fiction, truth, deceit and outright lies. We are all players in a magnificent flow of life staged over long periods on different stages. History is written by the winners, determined as much by bias, perception and perspective as a presentation of all that actually happened. History is the combined stories of all people from different times and many places. It unfolds as geo

This video is a preview of the article Turquoise in China, Past and Present.

Water web is a distinctive look in turquoise. At higher grades it is rare and very desirable. In this video Mike explains the look and we see examplea from Kingman and Candelaria.

Challenges with XRF Data Neil Ray. West Texas Analytical Laboratory. XRF testing has significantly grown as an option to test unknown turquoise, and the algorithm is constantly improving with growing accuracy as more reference samples are constantly added to the dataset. As much as the lab would like it to be, it is important to stress that the algorithm is not 100% accurate and only a probability of origin is returned. Considering the number of mines and varieties of turqu